Indigo Summer: Conditions & Protects Colour Treated & Chemically Processed Hair. Indigo Summer Colour Protection Conditioner has been formulated with nature’s richest plant-based moisturizers, specifically for use on colour treated hair. Silk Amino Acids strengthen and repair hair, while the botanical ingredients intensify colour brilliance and vitality. Indigo Summer Colour Protection Conditioner enhances colour retention while repairing, strengthening and sealing in moisture. Indigo Summer Colour Protection Conditioner will leave hair moisturized, silky soft and brilliantly shiny. All Prairie Naturals hair care products are enriched with pure, natural aromatic oils.